romney saying that president obama is an eloquent speaker. and the obama campaign saying romney is an experienced debater. >> they will be debating domestic policy. tahman bradley in washington, thank you for that report this morning. >>> as the campaign heats up, the president delivered what will likely be his last major address on the world stage before election day. he called on leaders to stand up against the violence and extremism. he defended free speech. but criticized the deadly protests across the middle east. and the president had much praise for murdered u.s. ambassador, chris stevens. >> we're serious about these ideals. we must speak honestly about the deeper causes of the crisis. today, we must reaffirm that our future will be determined by people like chris stevens and not by his killers. >> the president vowing to bring stevens' killers to justice, while continuing to support democracy in the muslim world. >>> and it is setting up to be another big day at the u.n., as the spotlight now shifts to arab leaders. iran's president,